Issued on: 01/11/2021 - 15:31

In this edition we explore how toreduce the carbon footprint of the blockchain, an underlying technology in which many cryptocurrencies are encrypted. The blockchain requires significant computing power and hence consumes a lot of energy, prompting a push to find ways to make it greener.

NFT art combines a digital work of art with a unique, tamper-proof certificate encrypted in the blockchain. This is a revolution because it makes it possible for the first time in the digital world to distinguish an original version from its copies and to give it an ownershiptitle.

The owner receives an NFTor non-fungible token,which certifies that he or sheis indeed the official owner of the artwork.The problem is that the underlying technology, the blockchain,has a high carbon footprint.

We ask John Karp,co-author of "NFT Revolution", how to make NFTs and the blockchain more environmentally friendly.

Plus, we tell you how the US's top military commander has confirmed a test by China of hypersonic weapons. Those weapons could be used in the creation of a system orbiting in space, capable of shooting down an incoming attack. It's the first time the US has acknowledged the Chinese test.

And in Test 24, Peter O'Brien showcases a model of a nanosatellite launcher by French startup Venture Orbital Systems.The real version is set to be 10 times bigger and should be operational by 2024.

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Tech 24 - How to reduce the environmental impact of the blockchain? - FRANCE 24